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Surge-Proof Combination Air Valve for Pump Stations and Long Pipelines
- Type: Air Release valve
- Size: DN 50 - DN400 (1" Male screw)
- Pressure ratings: PN10,PN16,PN25,PN40,Class125,Class150
- Body: Ductile iron, Stainless steel
- Temperature Range: 0-70 ºC
- Medium: Water
- Connection: Threaded, Flange
KEY FEATURES & BENEFITS
- Golden ratio designed body and cover to generate fantastic outline
- Aerodynamic air flow path inside, Efficient release of air pockets from pressurized pipe lines.
- Stainless steel with fully corrosion resistant parts, maximum PN40 bar rated, provided with internal ribs for accurate guiding of the float.
- Tangential drainage to ensure fully drain, sideway with female threaded for retrofitting drainage pipeline or check valve
- Compact, simple and reliable structure: Lower maintenance and increased life span.
- Nozzle can be different port size to fit for demands of different pressure grades
- Dynamic sealing: Prevents leakage under low pressure conditions (1.5 psi; 0.1 bar).
- Approved quality control process: Performance and specification tested and measured with specialized test facility.
| NO | Part Name | Material | Remark | NO | Part Name | Material |
| 1 | Body | DI | 11 | Top float | PP | |
| 2 | Screw | A2 | 12 | Seal ring | FKM/NBR | |
| 3 | Plate Ring | SS304 | 13 | Top flange | SS304 | |
| 4 | Lower float | PP | 14 | Screen | SS304 | |
| 5 | Seal | EPDM | 15 | Cap | SS304 | |
| 6 | Seal retainer | SS304 | 16 | Screw | A2 | |
| 7 | Screw | A2 | 17 | Bolt | A2 | |
| 8 | Middle float | PP | or 4F3F only | 18 | Nut | A2 |
| 9 | Nozzle | SS304 | 19 | Washer | A2 | |
| 10 | Oring | NBR | or 4F3F only | 20 | Bolt | A2 |
FAQs
A combination air release valve is designed to automatically release trapped air and admit large volumes of air in water pipeline systems. It helps improve flow efficiency, prevent vacuum conditions, and reduce the risk of pipeline surge or water hammer.
Combination air valves are typically installed at pipeline high points, long horizontal sections, pump discharge lines, and areas where air accumulation or vacuum conditions may occur. Proper installation improves pipeline safety and operational stability.
A surge-proof air valve controls air discharge during pipeline filling and operation, helping reduce sudden pressure surges caused by rapid air evacuation. This design is especially suitable for pump stations, rising mains, and long-distance transmission pipelines.
Full bore air valves provide higher airflow capacity for rapid pipeline filling and draining. Reduced bore designs offer more controlled airflow and are commonly used where surge protection and stable air discharge are required.
This air valve is widely used in: Water transmission pipelines, Municipal water networks, Irrigation systems, Pump stations, Industrial water systems etc.
It is especially suitable for pipelines with elevation changes or long-distance transmission conditions.
Available materials include: Ductile Iron, Stainless Steel CF8 / CF8M, Duplex Stainless Steel 2205
Different material options are suitable for standard water, corrosive environments, seawater, and high-chloride applications.
The valve is available for pressure ratings up to PN40 and can be supplied with different flange standards including:
EN1092-2 PN10 / PN16 / PN25 / PN40
ANSI Class 125 / 150 / 250
Customized configurations are available upon request.
Yes. Customized flange drilling, coating systems, material selection, nozzle configuration, and pressure ratings can be supplied according to project specifications and pipeline operating conditions.
Tag:
SS disc flap valve
,ductile iron body
,API WRAS CE ISO etc
,Flange connection type
,SS304 valve disc
,SS316 valve disc
,Air release valve
,PN10 PN16 PN25 Air relese valve
,EPDM seat
,water valve
,Oil, Water, Gas, Sewage
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